add tardis_example.yml with virtual_packet_logging enabled

docs/io/visualization/tardis_example.yml

@@ -0,0 +1,60 @@
+# Example YAML configuration for TARDIS
+tardis_config_version: v1.0
+
+supernova:
+  luminosity_requested: 9.44 log_lsun
+  time_explosion: 13 day
+
+atom_data: kurucz_cd23_chianti_H_He.h5
+
+model:
+  structure:
+    type: specific
+    velocity:
+      start: 1.1e4 km/s
+      stop: 20000 km/s
+      num: 20
+    density:
+      type: branch85_w7
+
+  abundances:
+    type: uniform
+    O: 0.19
+    Mg: 0.03
+    Si: 0.52
+    S: 0.19
+    Ar: 0.04
+    Ca: 0.03
+
+plasma:
+  disable_electron_scattering: no
+  ionization: lte
+  excitation: lte
+  radiative_rates_type: dilute-blackbody
+  line_interaction_type: macroatom
+
+montecarlo:
+  seed: 23111963
+  no_of_packets: 4.0e+4
+  iterations: 20
+  nthreads: 1
+
+  last_no_of_packets: 1.e+5
+  no_of_virtual_packets: 10
+
+  convergence_strategy:
+    type: damped
+    damping_constant: 1.0
+    threshold: 0.05
+    fraction: 0.8
+    hold_iterations: 3
+    t_inner:
+      damping_constant: 1.0
+
+spectrum:
+  start: 500 angstrom
+  stop: 20000 angstrom
+  num: 10000
+  virtual:
+    virtual_packet_logging: True
+